Thermo-electric furnace-regulator.



. JQ BOBB ITT, THERMO-ELEOTRIG FURNACE REGULATOR;

APPLICATION FILED OCT. 7, 1908.

Patented June 28, 191-0.

6 SHEETS-SHEET 1.

Q/vitmmm JQH, BOBBITT. THERMO-ELEGTRIG FURNACE REGULATOR.

APPLIOA-TION FILED OUT. 7, 1908.

Patented June 28, 1910.

attach,

J. H. BOBBITT.

THERMO-ELEGTRIQ FURNACE REGULATOR.

, APPLICATION FILED our. 7, 1908.

Patented June 28, 1910.

6 SHEETS-BHEBT 3 I mullll'nlllIITIrllifllffi'fiimumln II!I IIIIIIIIIHIIMHHh 3,5 i

witnom Patented June 28, 1910.

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MMMHHMJ 1 m1; BOBBITT. THERMO-ELEGTRIG FURNACE REGULATOR. APPLICATION FILED OUT. 7, 1908.

J. H. BOBBITT. v THERMO-ELEGTEIG FURNACE REGULATOR.

- APPLICATION FILED OUT. 7, 1908.

Patented June28, 1910.

6 SHEETS-SHBET 5.

lllllllllllullilll gvwentaz Witness yam nah/2 0% Ottoman J. H. BOBBITT, THERMO-ELEUTRIG FURNACE REGULATOR.

" APPLICATION FILED OCT. 7, 1908. v

962,884 I, V Patented June 28,1910.

6 innmsannn'r a.

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' citizen the United Stategtxesiaiing .et

' Regulators, of which' theiellcwing isl e 'SPEClfiCZfl'ElOH. V Q

visio'n of a meter mechanism mechanically connected'with the damper-end check "of. itain predetermined limits, there cu'it coiinectiiis between the regulator"andv will be controlled-by'the variations in the tempciaturei 1 desigiiate a st that is piov 90 I invention comprises the tlucs of construction and arrangement of v mechanism for actuating the check 'and To all whom ii hwy-cencez m to improve and simplify lso as to be comparatively 'pensive to' nianufeciure and in'stall fthce oughly reliable and eflie'ient i i use, and

readily breakii g a circuit to throw check open, :i certain illustrate ene eliiboclimeiit of the Kimmie dezeemeaemczemc,firrmmce-iiaemi mon.

eczeei;

' Be it, knowntl'iat 1, James HQ Benei'rse, {L-

Harverd the want}; ef -illey and; State of Nebreske, he.ve mventechnew anti useful Improvements in Th-emoFiectri-c Furnace relates" 'tcffemilet ng apg Thieiiiveiltiozi I v paratiis for furnacesami theli e and. mateparticula'rly to thermo electric regula tor whiehcontrolsthe dam e1 entirch'eckof the furnace so that when the t emperetui'e" rises above; a, regletermined maximum; the damper will close we the'chech openlenci vice vei 'se', when th predetermiiiecl minimum. i e I The inventionhiie for ofitsfebjecte the construction and operatioiibf apparatus cf thisxehemctei" eimple'aiid inexadjusted for any desired conditions. of service. 1 f 1 4 Another object of th'einvention 1s the-prothe vfunis ce and controlled by a thermostat Rally-actuated switch device for making and the-motor mech-' anism. into or out of operation;

Afurther object is the employment of a signal device-vb ereby the attendant or janitor of a building will be iiiformed as to the operative conclition ef e. furnace, as for instanceywhen the damper is closed. and the signal will be given and when the damper is open and thecheck closer], enother signal will be given. iVith these objects in tiew, and oth'ers,'as will-appear the ilesci'iptionlproceecls, the

' various novel feaparts which will be more fully described hereinafter and set forth with particularity ii /the claims appended hereto.

In the accompanying drawings, which invention, Figure 1 is a perspective VlOW of the motel" damper of :1 furnace. Fig. 2 is an end eie vaticn of a motor mechanism with the easing removed. Fig. 3 is a vertic i ezction I .011 line 83, Fig. 2. Fig. 4 is-a e iiei section on line M, Fig. 2. Fig. 5 is a. horir ipeeifieetion of Iieirte'ze Eetent'. 1 Patented g ce'tidn ii led Oetn'ner 7, 1368. Serial No. 456,548.

ifliT-ENT oFfFicE; 5

eefvezen, NEBBAEQKA,

zontal iceei m iim 5 5, Fig. 4 Fig. 6

J nie 28; 1910.

isle; modified form of eperetive COHDBCflOIlS' between ighe meter mechanism and the damper inz dehecka uatip *le verik Fig. 7 is e frentview qfithe regu atonfl Fig. 8 is a similar View with; the limit vo1" later casing removed-A- Fig; 9 is a." horizontal section on line 9+9, Rig. 8. Fig. 10 ish' eimilai' Section on line 1 0-l0 Fig. 9, showing the m mesm. F igQ; I matic VlQW of the circuit conneetio'ns. Fig. 12- is a perspective viewof ziio'tor illustrated in, elevation in Fig.4. j

=.' Similar i eference cha'zec't'exfs' are employed I r to designate cor 'espon'ding. parts through temperature fallsvto'ia 'o itthe'se'veml-vlews.

the .regui x 11- is ,2 dia'gmm I that section oft-h Y L relatively short connections can'be run from ihe'mechamsm to the damper and check to thus'miniinize'the power" required foitheiif operation and, the regulator may I be located in any suitable. partof the building to be heated-by the flliIlHC(-3,-St1h, for instance,- as erlivin-g room, ofiiceQ-or the like where the i 'emperatune is to be-mainta-in'ed withincerbeing C1I- as mechahism whereby the latter RGfQlIlllgl to the (lfzivyfing, supporting structure or vlgledwlth 'a bracket or s [elf 2 on which is perably located in' lqhe c'ellei' or fufnacerooixi, cenveniently close to the' furnace'so that meunted the motor ine chanismAi The mo-i tor iiiechanisngi includes a whelhi which; is

with a cross-shaped lever on e piyot S on the the mechanism- A.

connected; respectively, by otheigelements, 11 and and eheck'of the furnace in 'such a manner 7 which oscillates the rods, cords or that as "the lever is oscillated-in. one fllIBC- The contrelof the mot on m'echaiiism will be'more fully described hereinafteiy jbut it 12 with the, damper connected by a crenk pin' i with a. connec t- L 111;; rod-5 wh ch is hingedly coniiecteclet 6 poet 1 at a point above The arm's 9 EndlO are is to be' understood. that the wheel 3 turns" through one huz di ed and eightydegiees for opening the damper and closing the check and then remains stationary until the temperature has reached a predetermined maximum when the motor will continue to revolve through an arc of one hundredand eighty degrees for closing the damper and opening the check and continue to operate in this manner automatically to maintain the temperature substantially even. Fig. 6 shows a modification of the operative connection between the motor mechanism-and damper and check'actuating lever. In addition to the wheel 3, the idler pulley 16 is employed and a chain 17 is connected with the two intermediate arms of the lever 7 and the wheel 3 is connected by a pin 19 with the chain.- As'the wheel 3 turns to the position shown, through one hundred and eighty degrees, the right length of the chain creates a drafton the actuating lever 7 and oscillates the same in one direction and during the succeeding half revolution of the wheel 3, the draft .is produced on the lever 7 by the left length of the chain.

The motor mechanism consists of a supporting structure or frame including front and back late; 20 and 21 arranged parallel to each ot er and spaced apart and suitably secured to the base late or shelf 2, the

3 cross rod 22.

plates being ri' 'dly old at the top by a ounted on the frame is a drivin shaft 23 that projects forwardly from t e front plate 2 and to which projecting end is secured the wheel 3. ()n the shaft and located immediately behind the frontplate 20 is a large gear wheel 24 rigidly secured to the shaft to rotatethere with. The wheel 24 meshes with the pinion 25 secured to theshaft 26 that is rotatably mounted on the plates 20, 21, and is rovided with a large, gear wheel 27 w rich meshes with a pinion 28 on a third Ldhaft 29. ()n the shaft 29 is a large gear wheel 30 that meshes with a pinion 31 on a brake-carry ing shaft 32, the several gear wheels and pinions constituting a speed-multiplying gear between the driving and brake shafts 23 and 31 so as to rotate the latterat a high.

speed. The brake comprises a disk 33 secured to the shaft 32 to'rotate therewith and the rear side face of the disk is flat to be engagfid by a brake shoe 34 arranged on the ra e lever 35 fulcrumed at 36 on the front plate of the frame, the said lever being automatically set when the driving wheel 3 has turned half a revolution. The brake lever 35 is actuated by an armature 37 fulcrumed on a pin38 and provided with an arm 39 that has an upwardly-projecting extension 40 that engages in front of the lower end of the brake lever so that as the armature is drawn 'rearwardly, the brake. shoe will he 41 which attracts the armature rearwardly .is energized, the armature disengagcs the pawl from the opyening 4A and simultane ously releases the rake shoe so that the m0- tor mechanism can operate, and, the pawl the wheel 24 so as to maintain the brake shoe out of contact with the brake disk while the electro-ma ct isdenergized and until the next opening it has been reached .b the wheel 3 turningithrough one bond and i '80 43 is adapted to ride on the rear surface of eight degrees, whereupon the and will enter t e opening 4A and provi e movement whereby the brake shoe will again automatically set. The brake device is provided with a governing means which consists of centrifu ally-acting weights or balls 45 mounteif on springs 46 connected with .collars 47 and 48 on the brake shaft 32. In case the speed of the brake-shaft becomes excessive, the halls fly outwardly and draw the brake disk rearwardly into contact with the brake shoe which is held in rearward position by the awl l3 riding on the rear side of the wheePQA: so that the friction between the brake disk and shoe will be sufiicient to slacken the speed.

Mounted on the base plate or shelf 2 are: cells C which constitute a battery for supplying current to operate the electro-ma at and signaling devices. One pole of the attery is connected by "a wire 50 with a binding postol which is, in turn, connected by a wire 52 with the electro-ma net 41 and the elcctro-Inagnet is grounded y a wire 53 on the frame of the motorlfmechanism. On the basedplate are spring contacts 5% and 55 so re pectively, to the binding posts 56 hind 57 and arranged with their free ends disposed at opposite sides of the driving shaft 23, and the wheel 24 on such shaft is provided with a tubular extension or hub 58 that carries a contact in 59 which engages one or the other of tlie contact s rings so that the circuit will be completed y engagemcnt of the contact pin with either contact spring when the thermostatically-actuated switch of the regulator is closed by a rise or fall in the temperature acting on the thermostat of the regulator. On the whee 24 are contact posts 60 so arran ed as to engage a spring contact 61 secure to i the base platefl by a binding post 62. In

the present instance one post 60 is arranged at one side of a diametnical line passing I 7 am-ban i a "timj through the 'operi ihgsA While twd otherposts- 60. are ag'ranged at the opposite sides of Such 'rliametrical line; I lhisfmean-'s=tha;t "during one half of the revolution of thi wheel-24, as, during theclosing of madam-- posts. 91,, 92,1 93;

" p fiQ ext ing thrfough" the, fronfliof correspondingly ehergizeithesignalingde fig-19 0. Tfi'- i .ding,- posiis 6a" icei -dfth'e'regulatorf-sb'tlidt n' ma swmammal mam-is .:Arran df I i" the, iofihl part3 ar metal; Contact members I that 'zer 95,wires 112 100', 6

i knowhy the semi a. theheati'ng. system torise in temperatureto 41,wire 50. Thiscurrent energizes the .elec- 'anism to make another" half turn to close" the damper and,'open the check. Twoon moredegrees variation inth'e temperaturewill ,b'e'suflicient j efiecting the opening and closingTof the {the damper and the there magnet 41 will be deenergized and the conto move until it engages with the contact 54 so that thecircult of the gagement ofvthe pawl 43 of thewheels 24so as to hold the brake shoe j connected with I I throw the index 96 to the motor mechanism and, cause the furnace damper to open and the check to close. At the same time ,the contact 59 moves out of sugar ement with the spring contact 55 to y open the circuit so that the electrotact 59 continues electro-inagnet 87 will beolosed when the temperature risesto the' n1ax1n1um point. During this movement of the contact 09 the armature of the electromagnet 41, however, willr'be held in rearward with the rear side .disengaged and permit the wheel 3 to freely turn-underthe pull of the weight 14. As theswlieel 24 turns, either the single contact 60 on one'half of the wheel, or the two con tacts 60011 the other half will engage the spring contact 61,.sothat current wi flow from the wire 104 thro'u h the wire 1'11, buz I contact spring 6 1, contact post 60; ,on the wheel 24, which is the battery, as before r closing the'damper and twice anisin; for opening'the damp'en'or vice versa.

whereithe regulator is situated will flingof the buzzer whether the damper is opening or, closing. ASSUIII. new that suitable time has elapsed-for maximum ow'ingi'to the opening of the dampera nd. closing ofjthe check, and assuming that. the thermostatically-operated lever 76 lifl sibeen reversed as to close the circuit tengageniezt ofthe contact 79 with the contact 80 1c .teiFIthrough-pam rre'nt'will flow from the bator-e describedhto ough the contact the movement 1e damper) hub electro-rnagnet tro-magnets 87 and 41 so as respectively to tio'nopposite-the' point C fo'r'showing that the damper isjclo sing andj'torelease thepawl 43 and brake 34 to permit the motor mach -.to fclose either circuit for tem'erature at which the circuits will be opene within a given range of position by the enwith the contact 80, cuit and causing "just enough "to bring t men-. tioned, The buzzer circuit will be closed once durin the, movement of the motor mechanism o during" the movementof the -motor mech- .tacts 80 a of the'path as herein 7 r the ,contact 7 9, thence 80,.wire 1,14, and" thel I pperfielectro-magnets 87, wires 115,101, 67,

spring-.contact =54, -conta'ct points 59 (which has previously been brought into engagc'-' merit-with suchspring contact by the half 5'0 right to afposibanked for. the night.

the regulator; as indicated I and when the hour has arrived firejcontacts will engage each other and eorn-' and closed can be reg:

ulated by the adjustment of the'screw 85 and bynoting'the temperature on the thermometer T on the front plate or cover of the regulator casing 74.-

I In order to set the apparatus to operate temperature changes the draft of the furnace is kept open until the maximum temperature, say 72, is reached, as ascertained from the thermom ter T. The switch 97 is then adjusted tocontact with the first contact point 99 to connect the lamp with, the batter and the index or adjusting screw 85 is t en turned to move the thermostatic lever 76 in a direc tion to bring the contact 79 into enga ement thereby closing t e cirthe lamp to glow, understood that the contact 59 of the motor mechanism will-be. in engagement with the spring contact 54 when t e damper is open. screw 85 is turned e lever into engagement with the contact 80 and the turning of the screws is stopped as soon as the lam The index or adjust-in glows. The operator then throws the switc 97 into engagement with the 99 to cut the lamp out of circuit and permit current. of 'sufiic'ient strength to pass through the circuit to energize the electromagnets 87 and 41 for the urpose of actuating the indexfinger 90 an closing the damper and opening the check of the furnace; The connd 81 are so arranged with respect to thecontacts79 that a change of two or more. degrees in temperature will cause one circuit on, the 0 er to open so that if the temperature falls two degrees or to the point indicated on the thermometer, the consecond contact,

it being tact 79 will engage the contact 81 and close I the circuit for opening the damper and closing the check. After thus adjusting the vscnew- 85,- the apparatus will continue to operate at the minimum and maximum temperatures 'of'jfl and 7:2", 7

A clock may be employed for. automatically' controlling [the circuit to, open the damper and. close as for instance, an IlSlIlg that the house can becomfortably heated at-therisingtime. For this-purpose, the switch 97 may be moved to the thirdpoint 99 to connect-in circuit the clock 'the switch 97: being thus set at mechanism has closedv the damper and opened the check as when the furnace is An ordinary alarm top of the casing of 7 partially at D Fig. 7, and within the clocc are arranged two contacts. :a and b which are m-aintained clock is arranged on the hour br sobefore in the morning so a time when the motor separated by-the snail Wheelcthat controls plete the circuit through the wires 118 and 119 connected, respectlvely, contact point 99 and with the wire 107. The circuit will thus be closed to connect the electro-magnets 86 and 41 with the battery so that the motor mechanism will be actuated to open the damper and close the check.

Having thus described the-invention, what I claim is 1. In an apparatus of the class described, the combination of a thermostatically actuated circuit closer responsive to predetermined maximum and minimum temperature conditions, circuits connected with the said closer, draft regulating devices, and a motor mechanism controlled by the said circuit closer for operating the draft devices; said motor mechanism comprising a frame, a

shaft mounted thereon, a wheel secured to the shaft, a weight c0rd device for turning the wheel, a connecting element between the Wheel and the draft devices, a contact finger mounted on the shaft to rotate therewith, spring contacts with which the contact finger is adapted to engage, a brake disk, a shaft supporting the same, a train of gears between the shafts, a governor 0n the second mentioned shaft, and connected with the brake disk, means for rotating the governor from the first mentioned shaft, a brake shoe arranged to engage the disk, a lever mounted to release the brake shoe, an armature connected with the lever, an electromagnet arranged opposite the armature and adapted to be connected in circuits when the circuit closer is closed and the contact finger is in engagement with either spring contact.

' 2. In an apparatus of the class described, the combination of a thermostatically actuated circuit closer responsive to predetermined maximum and minimum temperature conditions, circuits connected with the said closer, draft regulating devices, and a motor mechanismcontrolled by the said circuit closer for operating the draft devices; said motor mechanism comprising a frame, a

with the 'third shaft mounted on the frame, means tending to rotate the shafts, connecting means between electromagnet opposite the armature and adapted to be connected in circuits by the circuit closer, a make and break device included in the said circuit, and a pawlon the armature bearing on the said wheel when the latter turns for holding the brake shoe released when the armature is disengaged, said wheel having means with which the pawl engages to stop the movement of the wheel when the draft devices are fully opened or closed. I

3. In an apparatus of the class described, the combination of a furnace-regulating de vice, a motor mechanism connected therewith, a thermostaticallyactuated switch, electrical means controlling the operation of the mechanism and connected in circuit by the switch, oppositely-disposed and spaced electro-magnets independently connected in circuit by the switch, a common index device actuated by the electro-magnets for indicating the draft conditions of the furnace, an audible signal, and a make and breakdevice operated by and connected with the motor mechanism for actuating the audible signal in a predetermined manner during the opening of the draft and in a different manner during the closing of the draft. In testimony whereof I afiix my signature in presence of two witnesses.

JAMES H. BOBBITT.

Witnesses:

FRED TURNER,

R. DE Gimrr. 

